Hawzah News Agency – The commander of the faithful, Imam Ali peace be upon him says:
أربَعٌ مَن اُعْطِيَهُنَّ فَقَد اُعْطِيَ خَيرَ الدُّنيا والآخِرَة: صِدقُ حَديثٍ، وأداءُ أمانَةٍ، وعِفَّةُ بَطْنٍ، وحُسنُ خُلقٍ.
'There are four things which when given to someone, they have indeed been given the good of this world and the Hereafter: truthful speech, fulfilment of trust, restraint in [filling] one's stomach [from the forbidden], and a good nature.'
Source: Ghurar al-Hikam, no. 2142